The Museum of the Rockies at Montana State University will open its doors free of charge to all Museum Day ticketholders on Saturday, Sept. 22.

Hosted by Smithsonian Magazine, Museum Day represents a national commitment to access, equity and inclusion.

More than 250,000 people nationwide downloaded tickets for last year’s event, and Museum Day 2018 is expected to attract more museum-goers than ever before.

During the free day, visitors can see the museum’s two new changing exhibitions, “Into The Arctic” and “Polar Obsession,” which also open that day. The exhibits feature photographs and paintings by two daring and creative explorers that will guide visitors on an artistic journey through the northernmost part of Earth.

Museum Day tickets are available for download at Smithsonian.com/MuseumDay.

Visitors who present a Museum Day ticket will gain free entrance for two. One ticket is permitted per email address.